/**
 * http://usejsdoc.org/
 */
var fs = require("fs");
//创建一个可读流
var readerStream = fs.createReadStream('input.txt');
//创建一个可写流
var writerStream = fs.createWriteStream('output2.txt');
//管道读写操作
//读取input.txt文件内容，并将内容写入到output2.txt
readerStream.pipe(writerStream);
console.log("程序执行完毕。");